Upper receiver for a firearm



FIG. 1 is a right, rear, upper perspective view of an upper receiver for a firearm, showing my new design;

FIG. 2 is a right, rear, lower perspective view thereof;

FIG. 3 is a left, rear, upper perspective view thereof;

FIG. 4 is a left, rear, lower perspective view thereof;

FIG. 5 is a right, front, upper perspective view thereof;

FIG. 6 is a right, front, lower perspective view thereof;

FIG. 7 is a left, front, upper perspective view thereof;

FIG. 8 is a left, front, lower perspective view thereof;

FIG. 9 is a right side view thereof;

FIG. 10 is a left side view thereof;

FIG. 11 is a top view thereof;

FIG. 12 is a bottom view thereof;

FIG. 13 is a front view thereof; and,

FIG. 14 is a rear view thereof.

The broken lines shown throughout the various figures depict additional structures that form no part of the claimed design. 

CLAIM The ornamental design for an upper receiver for a firearm, as shown and described. 